Pilots uses aneroid barometer to know the height above sea level because
A light ray passing from air into water at an angle of 30º from the normal in air would
A solid cube of aluminum is 1.5cm on each edge. The density of aluminum is 2700kgm\(^{-1}\). Find the mass of the cube.
The value of R required to make the galvanometer measure voltage up to 40V in the diagram above
5 X 10\(^{-3}\)kg of liquid at its boiling point is evaporated in 20s by the heat generated by a resistor of 2\(\Omega\) when a current of 10A is used. The specific latent heat of vaporization of the liquid is
